Tyrone saw off Donegal in extra-time in the Ulster final, on a scoreline of 1-19 to 2-14 in Owenbeg.
They will now play Tomás Ó Sé's men the weekend after next.
The Louth footballers are the Dalata Hotel Group Leinster under-20 champions for the first time since 1981.
The Wee County were 2-19 to 1-15 winners over Meath in Newbridge last night.
Mayo claimed the honours in Connacht with a 2-17 to 4-8 win over Roscommon in Tuam.
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